RDOS support

[Leif Ekblad]

> Ok, code checked in.

OK. The only thing I needed to do to compile was to remove
target-newlib from the configure file, rdos section. Everything
else seems to work just fine.

>  Please note that the editor you are using is 
> putting \r at the end of lines.  When you submit subsequent patches, 
> please run something like:
> 
> tr -d \\r <YOURFILE >tmp.fil; mv tmp.fil YOURFILE

OK, I'll try to remember that.
 
Leif Ekblad
www.rdos.net/rdos